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题名: Long-term seasonal nutrient limiting patterns at Meiliang Bay in a large, shallow and subtropical Lake Taihu, China
作者: Ye, Rui1; Shan, Kun2, 3; Gao, Hailong1; Zhang, Ruibin1; Wang, Shuai4; Qian, Xin1
关键词: Eutrophication ; trophic state index ; nutrient limitation ; generalized additive model ; Meiliang Bay
刊名: JOURNAL OF LIMNOLOGY
发表日期: 2015
DOI: 10.4081/jlimnol.2015.1147
卷: 74, 期:3, 页:519-529
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Limnology
研究领域[WOS]: Marine & Freshwater Biology
英文摘要: Lake Taihu has undergone severe eutrophication in the past three decades, and harmful cyanobacteria blooms occur nearly every year in Meiliang Bay at the north end of the lake. To elucidate the potential relationship between seasonal nutrient limitation and phytoplankton proliferation, a 20-year (1992-2011) time series of nutrient limitation in Meiliang Bay was analysed for deviations between trophic state index (TSI) parameters. Results showed that patterns of nutrient limitation in Meiliang Bay were distinctly seasonal, where phytoplankton growth was generally phosphorus (P)-limited in winter and spring, but nitrogen (N)-limited mainly occurred in summer and fall. This general pattern, however, shifted into N limitation across the four seasons during the mid-1990s because a rapid increase in industrialization led to a significant rise in the input of N and P from inflowing tributaries. The initial patterns were restored by environmental regulation in the end of 1990s, including the Zero Actions plan. Using routine monitoring data, a generalised additive model (GAM) with time and deviations between trophic state indexes for nitrogen and phosphorus (TSIN-TSIP) as explanatory variables was used to explore which nutrient was responsible for limitation of phytoplankton chlorophyll-a (Chl-a) in different seasons. Surprisingly, the model revealed a weak N limitation (TSIN-TSIP=-10) corresponded to peak values of Chl-a in summer-autumn season, which is probably because the phytoplankton community is co-limited by N and P during the period. The shift of nutrition limitation during winter-spring would partially explain high values of Chl-a throughout 1996. This study suggests that seasonal patterns of nutrient limitation must be considered to develop effective management measures to control cyanobacterial blooms.
关键词[WOS]: DRINKING-WATER CRISIS ; TROPHIC STATE INDEX ; PHYTOPLANKTON GROWTH ; NITROGEN ; EUTROPHICATION ; PHOSPHORUS ; BLOOMS ; CHLOROPHYLL ; LIMITATION ; ECOLOGY
语种: 英语
项目资助者: National Basic Research Program (973) of China(2008CB418003) ; Major State Water Pollution Control and Treatment Technique Program of China(2013ZX07101014-05) ; Natural Science Foundation of Jiangsu Province(BK20140603)
WOS记录号: WOS:000363903200010
ISSN号: 1129-5767
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/27342
Appears in Collections:藻类生物学及应用研究中心_期刊论文

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作者单位: 1.Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210023, Jiangsu, Peoples R China
2.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Environm Protect Dept Anhui Prov, Hefei 230071, Peoples R China
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